51.222.168.68📋 Copy

# IP Intelligence Briefing: 51.222.168.68/32

Classification: Moderate Risk | Analysis Date: 2026-06-20

Assigned: SOC Intelligence Team | Severity: MEDIUM

---

## Executive Summary

IP address 51.222.168.68 is a cloud infrastructure endpoint associated with Ahrefs Pte Ltd, hosted on OVH cloud infrastructure (ASN 16276). The IP exhibits moderate risk characteristics (score: 40) with firewalled/no services status. While the endpoint itself shows no active threat indicators, it resides within a high-abuse-density subnet (51.222.168.0/24) containing 178 threat siblings out of 222 active peers.

---

## Infrastructure Profile

---

## Network Services & DNS

• DNS PTR: proxy-ca018-san68.ahrefs.net
• Forward Resolution: proxy-ca018-san68.ahrefs.net
• Associated Domain: ahrefs.net
• Open Ports: None detected
• HTTP/TLS Services: None active
• Banner Detection: None
• Certificate Data: Not present

The endpoint shows no publicly accessible services with firewall configuration preventing external exposure.

---

## Threat Intelligence Assessment

Current Threat Indicators

• Blacklist Count: 0
• Known Attacker: No
• Spam Source: No
• Tor Exit Node: No
• Known Campaigns: None
• Abuse Confidence Score: Not applicable

Control Plane Analysis

• Route Stability: Unstable (isRouteStable: false)
• BGP Prefix: 51.222.0.0/16
• DNSBL Listed: 1 of 8 total lists
• Operator Score: 0.2174 (Minimal)
• RPKI State: Not reported
• DNSSEC: Valid

GeoValidation Discrepancy

Geolocation data indicates CA (Canada) with 56.13°N, -106.35°W coordinates but shows 5,597.9km distance with 29ms RTT. Minimum possible RTT for this distance is 112ms, indicating geographic data inconsistency requiring validation.

---

## Neighborhood Analysis (51.222.168.0/24)

The subnet exhibits elevated abuse density with approximately 69.5% of active IPs classified as threats. This contextualizes the moderate risk score against a background of significant neighbor activity.

---

## Relationship Graph

• Network Associations: 25 entries for OVH-CUST-281059697
• DNS Associations: 13 entries for proxy-ca018-san68.ahrefs.net
• Organizational Links: Ahrefs infrastructure

---

## Historical Observations

Observation Count: 23 signals recorded

Analysis Period: 2026-06-15 to 2026-06-20

• Threat Persistence: 0 days (not persistently malicious)
• Ownership Changes: 0
• Recent Operator Score: "Minimal" (0.2174)
• Signal Stability: Consistent operator scoring across observation window

No escalation in threat posture observed during the monitoring window.

---

## Recommended Actions

Immediate

1. Allow Traffic (Low Risk Endpoint): The IP shows no active threat indicators and is associated with legitimate cloud infrastructure (Ahrefs).

2. Monitor Subnet Context: Be aware of high abuse density in the /24 neighborhood when correlating alerts.

Firewall Rules

No specific blocking actions recommended. Standard egress/ingress filtering applies.

Monitoring

• Monitor for any service activation on previously firewalled ports
• Track subnet-level abuse patterns for correlation with legitimate traffic
• Validate geolocation discrepancy through additional ASN-level intelligence

---

## Intelligence Notes

This endpoint represents legitimate cloud infrastructure with no evidence of malicious activity. The moderate risk score (40) is driven primarily by subnet-level abuse density rather than endpoint-specific threat indicators. Security teams should distinguish between subnet contextual risk and actual endpoint behavior when processing alerts involving this IP.

Confidence Level: High (based on comprehensive profile and neighborhood analysis)

Recommended Handling: Allow with monitoring | Threat Status: Benign

This summary was generated by AI and may contain inaccuracies. Verify critical details independently.